Originally Posted by
Vasilis
Cerium oxide cuts very slowly, so, the felt would not be ideal. You can use the rough leather, and, don't worry about unevenness. After some passes, it will disperse.
As for the oil, vegetable oil wouldn't be my first choice. Maybe neatsfoot oil. For me, I use water as base, on untreated leather. The feeling while stropping remains the same as before.
Don't use too much, and be careful of some bigger particles that may be around.
I have to ask, why Shapton 30k and not Suehiro gokumyo 0.5micron?
Edit; I haven't tried making it a thick goo. I just add a gram or two on a shot glass or something like that, wait a minute for the bigger particles to fall on the bottom, and use a small paintbrush to apply. But, that's just me, and, although I have awesome results, my experience on this is limited.